| 摘要 |
PURPOSE:To make a fuel-burning equipment extremely compact by a method wherein in the inside of the blades of a centrifugal fan a fuel gas supply nozzle is installed and at a circumferential wall surrounding the outside of the blades a number of flame holes ejecting air-fuel mixed gas supplied by the blades are formed. CONSTITUTION:A centrifugal fan 1 consisting of blades 1a and an electric motor 1b is installed at the nearly central part of a case 2 and an air suction port 3 is formed at the case 2; a fuel gas supply nozzle 4 is placed in the inside of the blades 1a and at a cylindrical circumferential wall 5 a number of flame holes 6 are formed; and air-fuel mixed gas is delivered from the blades 1a to the holes 6 to form flames at the outside of each flame hole 6. Between the blades 1a and the wall 5 a cylindrical porous body 7 is installed to promote the mixing of the air-fuel mixed gas and distribute it uniformly to the holes 6. A number of heat transfer fins 8 are attached to a water pipe and placed in the case 2 and an exhaust pipe 12 interconnecting with an exhaust path 11 is placed in the case 2 and an instantaneous water is formed heater with chilled water supplied from one end 9a of the pipe 9, recovered from the other end 9b of the pipe 9 in the form of hot water. |
